GRID Flashcards
are used to reduce scatter radiation
Grid
by absorbing scattered xrays grids improve image contrast but may reduce the number of xray reaching the receptor
Reduces scatter
grids with higher ratios (12:1) absorb more scatter but may further reduce density
Higher Grid Ratio
results in more scatter reaching the receptor, which may increase overall density but decrease image qaulity
No Grid
refers to unwanted exposure on the radiograph
Fog
it reduces image contrast and can indirectly affect density
Fog
refers to limiting the size of the xray field
Beam Restriction (collimation)
less scatter radiation reaches the receptor leading to improve image contrast and lower density
decreased scatter
more scatter radiation reaches the image receptor which can increase overall density
Increased scatter